Co-feeding using live food and feed as first feeding for the small catfish <i>Trachelyopterus galeatus</i> (Linnaeus 1766)

Marinho, Y.F.; Oliveira, C.Y.B.; Mendes, L.E.M.; Santos, I.R.A.; Dias, J.A.R.; Ândrade, M.; Lopes, Y.V.A.; Azevedo, J.W.J.; Lourenço, C.B.; Moura, R.S.T.; Ottoni, F.P.

doi:10.1590/1678-4162-13060

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Animal Science • Arq. Bras. Med. Vet. Zootec. 76 (2) • Mar-Apr 2024 • https://doi.org/10.1590/1678-4162-13060 copy

Co-feeding using live food and feed as first feeding for the small catfish Trachelyopterus galeatus (Linnaeus 1766)

[Coalimentação utilizando alimento vivo e ração na primeira alimentação do pequeno bagre Trachelyopterus galeatus (Linnaeus 1766)]

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This study evaluated the effect of co-feeding with commercial feed and live food (enriched or not with microalgae) on the growth and survival of Trachelyopterus galeatus larvae. Five treatments were carried out: commercial feed as a control (F); brine shrimp nauplii (BS); brine shrimp nauplii enriched with Chaetoceros sp. Microalgae (BSM); combined feed with brine shrimp nauplii (F+BS) and combined feed with brine shrimp nauplii enriched with microalgae (FBSM). The larvae (5.00±0.02 mg and 5.95±0.33mm) were reared for 30 days. There were no significant differences (P>0.05) in water quality between treatments, but there were significant differences in weight, weight gain and survival. The F+BS and F+BSM treatments, which involved co-feeding, showed the best results in final weight (0.168±0.004g and 0.169±0.007g) and weight gain (0.1278±0.004 g and 0.1294±0.007g), respectively. The treatments with live food, enriched or not, showed high survival rates of over 73%, with no significant differences between them. On the other hand, the exclusive use of feed resulted in low survival (36.7 ± 9.53%), indicating that this may result in low growth and make the production of T. galeatus larvae unfeasible.

Keywords:
aquaculture; Artemia franciscana; Chaetoceros; larviculture; native fish

Treatment	pH	Dissolved oxygen (mg L^-1)	Nitrite (mg L^-1)	Nitrate (mg L^-1)
F	7.29 ± 0.03^a	5.93 ± 0.03^a	0.025 ± 0.03^a	0.007 ± 0.009^a
BS	7.26 ± 0.02^a	5.93 ± 0.02^a	0.000 ± 0.00^a	0.004 ± 0.006^a
BSM	7.24 ± 0.03^a	5.95 ± 0.03^a	0.000 ± 0.00^a	0.000 ± 0.000^a
F+BS	7.20 ± 0.08^b	5.95 ± 0.04^a	0.025 ± 0.03^a	0.022 ± 0.031^a
F+BSM	7.19 ± 0.07^b	5.96 ± 0.07^a	0.015 ± 0.02^a	0.035 ± 0.013^a

Diet	Final weight (g)	Weight gain (g)	Survival (%)
F	0.043 ± 0.003^b	0.0038 ± 0.003^b	36.7 ± 9.53^b
BS	0.040 ± 0.002^b	0.0035 ± 0.002^b	76.7 ± 9.44^a
BSM	0.044 ± 0.003^b	0.0045 ± 0.003^b	80.0 ± 9.43^a
F+BS	0.168 ± 0.004^a	0.1278 ± 0.004^a	73.3 ± 4.71^a
F+BSM	0.169 ± 0.007^a	0.1294 ± 0.007^a	80.0 ± 4.71^a

Universidade Federal de Minas Gerais, Escola de Veterinária Caixa Postal 567, 30123-970 Belo Horizonte MG - Brazil, Tel.: (55 31) 3409-2041, Tel.: (55 31) 3409-2042 - Belo Horizonte - MG - Brazil
E-mail: abmvz.artigo@gmail.com

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[1] Corresponding author: yllana.marinho@ufma.br